Northern Marsh Orchid
Dactylorhiza purpurella
Overview
The Northern Marsh Orchid is the most widespread orchid of the Sefton Coast dune slacks. Its dense, rich purple flower spikes can be abundant in good years — hundreds of plants in a single large slack. It was first recorded on the Sefton Coast as a new species in the 1960s. The flowers are a rich magenta-purple with darker spots on the lip. It hybridises with other Dactylorhiza orchids, which can create identification challenges.
At a Glance
| Order | Asparagales |
| Family | Orchidaceae |
| Habitat | Damp dune slack · Wet grassland · Calcareous fen |
| UK population | Common in the north of England, Scotland and Ireland on damp neutral to calcareous grassland |
| Sefton Coast | Common in dune slacks throughout the Sefton Coast — one of the more easily found orchids |
| Conservation | UK Green List |
Where to See It
Damp dune slacks and wet areas throughout Ainsdale NNR and Formby.
Identification
Upright plant to 40cm. Dense spike of rich magenta-purple flowers. Flower lip with darker spots and lines. Unspotted or slightly spotted leaves. Purple stems. Grows in damp situations.
Viewing & Photography Tips
Walk any damp dune slack at Ainsdale in June. Dense purple spikes are unmistakeable. Numbers can be impressive in good years.
Conservation Status
UK Green List
This species has a favourable conservation status in the UK and remains an important part of Sefton Coast biodiversity.
Frequently Asked Questions
Do Marsh Orchids form hybrids?
Yes. Dactylorhiza orchids hybridise freely where different species meet, producing plants with intermediate characteristics. On the Sefton Coast, Northern Marsh Orchid can hybridise with other marsh orchid species. These hybrids can be fertile and sometimes occur in populations, making identification complex. Consulting a specialist flora with detailed photographs is recommended for precise identification.
Related Species
Plan your visit to the Sefton Coast
Marshside RSPB, Formby pinewoods, Ainsdale NNR — practical guides to getting there, what to bring, and the best spots for each season.